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  <title>设置 include_path 配置选项</title>
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  <div id="layout-content"><div id="function.set-include-path" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">set_include_path</h1>
  <p class="verinfo">(PHP 4 &gt;= 4.3.0, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">set_include_path</span> &mdash; <span class="dc-title">设置 include_path 配置选项</span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-function.set-include-path-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>set_include_path</strong></span>(<span class="methodparam"><span class="type">string</span> <code class="parameter">$include_path</code></span>): <span class="type"><span class="type">string</span>|<span class="type"><span class="type false">false</span></span></span></div>

  <p class="para rdfs-comment">
   为当前脚本设置 <a href="ini.core.html#ini.include-path" class="link">include_path</a>
   运行时的配置选项。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.set-include-path-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">include_path</code></dt>

     <dd>

      <p class="para">
       <a href="ini.core.html#ini.include-path" class="link">include_path</a> 新的值。
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.set-include-path-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   成功时返回旧的 <a href="ini.core.html#ini.include-path" class="link">include_path</a> 或者在失败时返回 <strong><code>false</code></strong>。
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.set-include-path-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-594">
    <p><strong>示例 #1 <span class="function"><strong>set_include_path()</strong></span> 例子</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />set_include_path</span><span style="color: #007700">(</span><span style="color: #DD0000">'/usr/lib/pear'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">//&nbsp;或使用&nbsp;ini_set<br /></span><span style="color: #0000BB">ini_set</span><span style="color: #007700">(</span><span style="color: #DD0000">'include_path'</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'/usr/lib/pear'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p>
  <p class="para">
   <div class="example" id="example-595">
    <p><strong>示例 #2 添加到include path</strong></p>
    <div class="example-contents"><p>
     利用常量 <strong><code>PATH_SEPARATOR</code></strong> 可跨平台扩展 include path。
    </p></div>
    <div class="example-contents"><p>
     这个例子中我们把 <var class="filename">/usr/lib/pear</var> 添加到了
     现有的 <code class="literal">include_path</code> 的尾部。
    </p></div>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$path&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #DD0000">'/usr/lib/pear'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">set_include_path</span><span style="color: #007700">(</span><span style="color: #0000BB">get_include_path</span><span style="color: #007700">()&nbsp;.&nbsp;</span><span style="color: #0000BB">PATH_SEPARATOR&nbsp;</span><span style="color: #007700">.&nbsp;</span><span style="color: #0000BB">$path</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.set-include-path-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.ini-set.html" class="function" rel="rdfs-seeAlso">ini_set()</a> - 为一个配置选项设置值</span></li>
    <li class="member"><span class="function"><a href="function.get-include-path.html" class="function" rel="rdfs-seeAlso">get_include_path()</a> - 获取当前的 include_path 配置选项</span></li>
    <li class="member"><span class="function"><a href="function.restore-include-path.html" class="function" rel="rdfs-seeAlso">restore_include_path()</a> - 还原 include_path 配置选项的值</span></li>
    <li class="member"><span class="function"><a href="function.include.html" class="function" rel="rdfs-seeAlso">include</a> - include</span></li>
   </ul>
  </p>
 </div>


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